CN210687002U - Radial combined sealing structure of axial flow type regulating valve - Google Patents
Radial combined sealing structure of axial flow type regulating valve Download PDFInfo
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- CN210687002U CN210687002U CN201921554988.0U CN201921554988U CN210687002U CN 210687002 U CN210687002 U CN 210687002U CN 201921554988 U CN201921554988 U CN 201921554988U CN 210687002 U CN210687002 U CN 210687002U
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- valve
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- cage
- ring
- accommodating groove
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Abstract
The utility model discloses a radial combined sealing structure of an axial-flow type regulating valve, which comprises a valve cage arranged in a valve body of the axial-flow type regulating valve, wherein a valve core is coaxially arranged in the valve cage, and an annular accommodating groove is arranged at the joint of the valve cage and a valve seat at the position of mutual cooperation and around the inner wall; the notch limiting part of the annular accommodating groove comprises a protrusion I arranged on the valve cage and a protrusion II arranged on the valve seat, an annular sealing ring is arranged in the annular accommodating groove in a surrounding mode, an elastic O-shaped ring is sleeved on the outer ring surface of the annular sealing ring, and the inner ring surface of the annular sealing ring is exposed out of the notch of the annular accommodating groove and matched with and props against the circumferential surface of the valve core; and a plurality of through holes which can communicate the external space with the internal space of the cage are distributed on the surface of the cage. The utility model can avoid the erosion of the flowing medium to the inside of the sealing structure, and greatly prolongs the service life of the sealing structure; after the valve is closed, fluid can be prevented from flowing from a high-pressure side to a low-pressure side along an annular gap between the valve cage and the valve core, and the sealing effect is good.
Description
Technical Field
The utility model relates to a seal structure specifically is a radial combined seal structure of axial-flow type governing valve, is applied to the manufacturing of pipeline valve.
Background
The axial flow type pressure reducing regulating valve is widely applied to regulating and controlling conveying pipelines due to the advantages of strong flow capacity, high dynamic stability, stable operation, low noise and the like. Through finding in carrying oil valve product research and development and market research, axial-flow type valve often uses soft seal structure, but the medium is more serious to the erodeing of sealing washer, has influenced sealed effect, has reduced sealed life, though the patent of application number DE3731349A1 discloses a trapezoidal ring packing that the effect is better, has the defect of "sealing performance is low" in the actual operation. The reason for this is that: the flowing medium erodes the sealing ring seriously, which reduces the service life of the sealing ring and can not ensure effective sealing. However, under severe working conditions, the sealing effect is good, the service life is long, and the sealing ring is effectively protected.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model aims at providing a radial combined seal structure of axial-flow type governing valve, simple structure can avoid flowing medium's erosion, and sealed effectual and sealed long service life.
In order to achieve the above object, the utility model adopts the following technical scheme: a radial combined sealing structure of an axial-flow type regulating valve comprises a valve cage arranged in a valve body of the axial-flow type regulating valve, wherein a valve core is coaxially arranged in the valve cage, the end part of the valve cage is fixed on a valve seat of the axial-flow type regulating valve in a matched mode, and an annular accommodating groove is formed in the joint of the valve cage and the valve seat in a surrounding mode at the inner wall; the notch of the annular accommodating groove is provided with a limiting part, the limiting part comprises a protrusion I arranged on the valve cage and a protrusion II arranged on the valve seat, the protrusion I and the protrusion II are oppositely arranged on the notch and extend towards each other along the axial direction of the valve cage, an annular sealing ring is arranged in the annular accommodating groove in a surrounding manner, an elastic O-shaped ring is sleeved on the outer annular surface of the annular sealing ring, and the inner annular surface of the annular sealing ring is exposed out of the notch of the annular accommodating groove and matched with and props against the circumferential surface of the valve core; the surface of the valve cage is provided with a plurality of through holes which can communicate the external space with the internal space of the cage along the axial direction of the valve cage.
Preferably, the inclination angle of the outer ring surface of the annular sealing ring is consistent with that of the groove bottom surface of the annular accommodating groove. Because the inclination degree is consistent, the pressure change of the flowing medium can be quickly transmitted to the elastic O-shaped ring through the outer ring surface of the annular sealing ring, so that the response speed and the deformation degree of the elastic O-shaped ring along the radial expansion and retraction deformation are effectively improved, the erosion is avoided, and the sealing effectiveness is ensured.
Preferably, the inner ring surface of the annular sealing ring is an inclined surface with an included angle of 45 degrees with the axis of the valve core, and the inner ring surface is matched and attached to the surface of one side, located in the groove, of the annular accommodating groove, of the protrusion I. The inclined planes which are mutually attached are beneficial to ensuring good sealing effect, and when the elastic O-shaped ring expands along the radial direction and contracts and deforms, the inner annular surface of the annular sealing ring can smoothly slide along the surface of one side, located in the groove, of the annular accommodating groove, of the protrusion I to realize corresponding sealing and erosion prevention functions.
Preferably, a transition fillet is arranged at the transition position of the inner ring surface and the vertical direction. When the valve is closed, the transition round angle can increase the contact area between the part of the inner ring surface exposed out of the notch of the annular containing groove and the outer surface of the valve core, so that the sealing effect is further improved; and can avoid the removal of case excessively to cut the inner ring of annular seal to cause the damage to it when the valve is opened.
Preferably, the shore hardness of the elastic O-shaped ring can reach 90. The rigidity is improved by higher hardness, and the service life is prolonged.
When the valve is closed, the part of the inner annular surface of the annular sealing ring, which is exposed out of the notch of the annular accommodating groove, is circumferentially wrapped and is matched with and fixedly clamps the outer surface of the valve core, so that a gap between the valve cage and the outer surface of the valve core is sealed, and the annular sealing ring can be tightly attached to the valve core, so that the sealing effect is good, fluid can be prevented from flowing from a high-pressure side to a low-pressure side along the annular gap between the valve cage and the valve core, and the effective sealing of the valve; after the valve is opened, the through hole of the valve cage can limit the flow and has the function of reducing the pressure of fluid on the sealing structure, so that the extrusion force applied to the elastic O-shaped ring is reduced, the elastic O-shaped ring integrally retracts along the self radial direction, the outer annular surface of the annular sealing ring is extruded from the outer side, the annular sealing ring is exposed out of the partial volume of the notch of the annular accommodating groove, the notch is blocked, flowing media are prevented from entering the annular accommodating groove from the notch to wash the annular sealing ring and the elastic O-shaped ring, and the service life is.
The utility model has simple structure and easy manufacture, can avoid the erosion of the flowing medium to the inside of the sealing structure after the valve is opened, and greatly prolongs the service life of the sealing structure; after the valve is closed, fluid can be prevented from flowing from a high-pressure side to a low-pressure side along an annular gap between the valve cage and the valve core, the sealing effect is good, and zero leakage is realized.
Drawings
Fig. 1 is a schematic view of the sealing structure of the present invention when the valve is closed;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is an exploded schematic view of FIG. 2;
fig. 4 is a schematic structural diagram of the present invention when the valve is closed;
FIG. 5 is an enlarged view at B in FIG. 4;
in the figure, 11 is a valve body, 12 is a valve cage, 12-1 is a protrusion I, 12-1-1 is a surface, 12-2 is a through hole, 13 is a valve core, 14 is a valve seat, 14-1 is a protrusion II, 20 is an annular accommodating groove, 20-1 is a groove bottom surface, 21 is an annular sealing ring, 21-1 is an inner annular surface, 21-1-1 is a transition fillet, 21-2 is an outer annular surface, 22 is an elastic O-shaped ring, 30 is a high-pressure side, 40 is a low-pressure side, and 50 is a clearance.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in the figure, the radial combined sealing structure of the axial flow type regulating valve comprises a valve cage 12 arranged in a valve body 11 of the axial flow type regulating valve, a valve core 13 is arranged in the valve cage 12 coaxially with the valve cage, the end part of the valve cage 12 is fixed on a valve seat 14 of the axial flow type regulating valve in a matching way, and an annular accommodating groove 20 is arranged around the inner wall of the valve cage 12 and the valve seat 14 at the matching connection part; the notch of the annular accommodating groove 20 is provided with a limiting part, the limiting part comprises a protrusion I12-1 arranged on the valve cage 12 and a protrusion II 14-1 arranged on the valve seat 14, the protrusion I12-1 and the protrusion II 14-1 are oppositely arranged on the notch and extend towards each other along the axial direction of the valve cage 12, an annular sealing ring 21 is arranged in the annular accommodating groove 20 in a surrounding manner, an elastic O-shaped ring 22 is sleeved on an outer annular surface 21-2 of the annular sealing ring 21, and an inner annular surface 21-1 of the annular sealing ring 21 is exposed out of the notch of the annular accommodating groove 20 and matched with and props against the circumferential surface of the valve core 13; the surface of the valve cage 12 is provided with a plurality of through holes 12-2 which can communicate the external space with the internal space of the cage along the axial direction of the valve cage.
Preferably, the inclination angle of the outer ring surface 21-2 of the ring-shaped seal ring 21 is consistent with that of the groove bottom surface 20-1 of the ring-shaped accommodating groove 20. Because the inclination degrees are consistent, the pressure change of the flowing medium can be quickly transmitted to the elastic O-shaped ring 22 through the outer annular surface 21-2 of the annular sealing ring 21, so that the response speed and the deformation degree of the elastic O-shaped ring 22 in radial expansion and retraction deformation are effectively improved, the erosion is avoided, and the sealing effectiveness is ensured.
Preferably, the inner ring surface 21-1 of the annular sealing ring 21 is an inclined surface having an included angle of 45 degrees with the axis of the valve core 13, and the inner ring surface 21-1 is fitted on the surface 12-1-1 of the protrusion i 12-1 on the side of the annular receiving groove 20 in the groove. The inclined planes which are mutually attached are beneficial to ensuring good sealing effect, and when the elastic O-shaped ring 22 expands and retracts along the radial direction to deform, the inner annular surface 21-1 of the annular sealing ring 21 can smoothly slide along the surface 12-1-1 of the protrusion I12-1 positioned on one side in the annular accommodating groove 20 to realize corresponding sealing and erosion prevention functions.
Preferably, a transition fillet 21-1-1 is arranged at the transition of the inner ring surface 21-1 and the vertical direction. When the valve is closed, the transition round angle 21-1-1 can increase the contact area between the part of the inner annular surface 21-1 exposed out of the notch of the annular accommodating groove 20 and the outer surface of the valve core 13, so that the sealing effect is further improved; and can avoid the damage to the inner ring surface 21-1 of the annular sealing ring 21 caused by the excessive shearing of the movement of the valve core 13 when the valve is opened.
Preferably, the shore hardness of the elastic O-ring 22 can reach 90. The rigidity is improved by higher hardness, and the service life is prolonged.
The ring seal 21 and the elastic O-ring 22 of the present invention are pre-compressed and embedded into the ring-shaped receiving groove 20. When the valve is closed, the flowing medium in the high-pressure side 30 outside the cage 12 flows into the cage 12 through the through hole 12-2 and is filled in the gap 50 between the inner wall of the cage 12 and the valve core 13, the elastic O-ring 22 has a tendency of expanding outwards along the radial direction under the action of high pressure of the medium, and at this time, the part of the inner annular surface 21-1 of the annular sealing ring 21, which is exposed out of the notch of the annular accommodating groove 20, wraps the outer surface of the valve core 13 in the circumferential direction and is clamped in a matching manner, so that the gap 50 between the notch and the outer surface of the valve core 13 is sealed, and the annular sealing ring 21 can be tightly attached to the valve core 13, so that the. When the valve needs to be opened, the valve core 13 moves along the axial direction, at this time, the valve core 13 is not in contact with the inner annular surface 21-1 of the annular sealing ring 21, the medium on the high-pressure side 30 can pass through the through hole 12-2 of the valve cage 12 and flow into the low-pressure side 40, the pressure of the flowing medium is reduced at this time, the extrusion force borne by the elastic O-shaped ring 22 is reduced, the whole elastic O-shaped ring 22 is reduced along the radial direction of the whole elastic O-shaped ring 22, and the outer annular surface 21-2 of the annular sealing ring 21 is extruded from the outer side, so that the volume of the part, exposed out of the notch of the annular accommodating groove 20, of the annular sealing ring 21 and the elastic O-shaped ring.
Claims (5)
1. The radial combined sealing structure of the axial flow type regulating valve is characterized by comprising a valve cage (12) arranged in a valve body (11) of the axial flow type regulating valve, wherein a valve core (13) is coaxially arranged in the valve cage (12), the end part of the valve cage (12) is matched and fixed on a valve seat (14) of the axial flow type regulating valve, and an annular accommodating groove (20) is formed in the joint of the valve cage (12) and the valve seat (14) in a way of surrounding the inner wall; the notch of the annular accommodating groove (20) is provided with a limiting part, the limiting part comprises a protrusion I (12-1) arranged on the valve cage (12) and a protrusion II (14-1) arranged on the valve seat (14), the protrusion I (12-1) and the protrusion II (14-1) are oppositely arranged on the notch and extend towards each other along the axial direction of the valve cage (12), an annular sealing ring (21) is arranged in the annular accommodating groove (20) in a surrounding manner, an elastic O-shaped ring (22) is sleeved on the outer annular surface (21-2) of the annular sealing ring (21), and the inner annular surface (21-1) of the annular sealing ring (21) is exposed out of the notch of the annular accommodating groove (20) and matched with and props against the circumferential surface of the valve core (13); the surface of the valve cage (12) is provided with a plurality of through holes (12-2) which can communicate the external space with the internal space of the cage along the axial direction of the valve cage.
2. The radial combination seal structure of an axial flow type regulating valve according to claim 1, wherein the inclination angle of the outer annular surface (21-2) of the annular seal ring (21) is coincident with the groove bottom surface (20-1) of the annular accommodating groove (20).
3. The radial combined sealing structure of the axial-flow type regulating valve according to claim 1 or 2, characterized in that the inner ring surface (21-1) of the annular sealing ring (21) is an inclined surface with an included angle of 45 degrees with the axis of the valve core (13), and the inner ring surface (21-1) is matched and attached to the surface (12-1-1) of the protrusion I (12-1) on the side, located in the groove, of the annular accommodating groove (20).
4. The radial combined seal structure of an axial flow type regulating valve according to claim 1 or 2, characterized in that a transition fillet (21-1-1) is arranged at the transition of the inner ring surface (21-1) and the vertical direction.
5. The radial compound seal structure of an axial flow regulator valve according to claim 1 or 2, characterized in that the shore hardness of the elastic O-ring (22) is 90.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921554988.0U CN210687002U (en) | 2019-09-17 | 2019-09-17 | Radial combined sealing structure of axial flow type regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921554988.0U CN210687002U (en) | 2019-09-17 | 2019-09-17 | Radial combined sealing structure of axial flow type regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210687002U true CN210687002U (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921554988.0U Expired - Fee Related CN210687002U (en) | 2019-09-17 | 2019-09-17 | Radial combined sealing structure of axial flow type regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210687002U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178270A (en) * | 2020-09-28 | 2021-01-05 | 昆山新莱洁净应用材料股份有限公司 | Sealing structure and fluid conveying device |
| CN113757399A (en) * | 2021-09-10 | 2021-12-07 | 特瑞斯能源装备股份有限公司 | Sealing structure for valve |
-
2019
- 2019-09-17 CN CN201921554988.0U patent/CN210687002U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178270A (en) * | 2020-09-28 | 2021-01-05 | 昆山新莱洁净应用材料股份有限公司 | Sealing structure and fluid conveying device |
| CN113757399A (en) * | 2021-09-10 | 2021-12-07 | 特瑞斯能源装备股份有限公司 | Sealing structure for valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200605 Termination date: 20210917 |